Indeed it is, lipo batteries like to be charged at 1C which is the rate that it would take one hour to charge fully so a 5000mah battery charged at 500ma would take 1 hour. All a fast charge does is charge at a higher C rate which is not good for the batteries lifespan if done repeatedly.
That said the advice I have been given is that if you can do a full discharge and recharge cycle at 1C once or twice a month you should get much better lifespan.
HalikusZion t1_jacysg6 wrote
Reply to comment by ProXJay in LPT: If you notice your iPhone battery is charging slower after the recent update, turn off clean energy charging. by JohnDeere714
Indeed it is, lipo batteries like to be charged at 1C which is the rate that it would take one hour to charge fully so a 5000mah battery charged at 500ma would take 1 hour. All a fast charge does is charge at a higher C rate which is not good for the batteries lifespan if done repeatedly.
That said the advice I have been given is that if you can do a full discharge and recharge cycle at 1C once or twice a month you should get much better lifespan.